package com.itheima.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.entity.dto.DishDto;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import lombok.val;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

//菜品管理
@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    //新增菜品
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);

        //清除所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_"+ dishDto.getCategoryId() +"_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    //根据ID查询菜品的信息和对应的口味信息
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    //修改菜品
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);
        //清除所有菜品的缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);
        //清理某个分类下面的菜品缓存数据
        String key = "dish_"+ dishDto.getCategoryId() +"_1";
        redisTemplate.delete(key);


        return R.success("修改菜品成功");
    }

   /* //根据条件查询对应的菜品数据
    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件
        queryWrapper.eq(Dish::getStatus,1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        return R.success(list);
    }
*/
   //根据条件查询对应的菜品数据
   @GetMapping("/list")
   public R<List<DishDto>> list(Dish dish){
       List<DishDto> dishDtoList = null;
       //动态构造可以，拼接Key  dish_564654654646_1
       String key = "dish_"+ dish.getCategoryId() + "_" +dish.getStatus();
       //先从redis中获取数据
       dishDtoList =(List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null){
            //如果存在，直接返回，无需查询
            return R.success(dishDtoList);
        }

       //构造查询条件
       LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
       queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
       //添加条件
       queryWrapper.eq(Dish::getStatus,1);
       //添加排序条件
       queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

       List<Dish> list = dishService.list(queryWrapper);


        dishDtoList = list.stream().map((item) -> {
           DishDto dishDto = new DishDto();

           BeanUtils.copyProperties(item,dishDto);

           Long categoryId = item.getCategoryId();//分类id
           //根据id查询分类对象
           Category category = categoryService.getById(categoryId);

           if(category != null){
               String categoryName = category.getName();
               dishDto.setCategoryName(categoryName);
           }
            //点前菜品ID
           Long dishId = item.getId();
           LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
           lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
           //SQL : select * from dish_Flavor where dish_id;
           List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
           dishDto.setFlavors(dishFlavorList);

           return dishDto;
       }).collect(Collectors.toList());

        //如果不存，需要将查询数据的数据缓存到redis中
       redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

       return R.success(dishDtoList);
   }

   //根据ID删除分类
    @DeleteMapping
    public  R<String> delete(String ids){
       log.info("删除菜品！，id为：{}",ids);

       dishService.deleteMoreDish(ids);

       return R.success("菜品删除成功！");
    }

    //菜品修改状态  停售和起售
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable("status")Integer status, String ids){
       log.info("status:{}",status);
       log.info("ids:{}",ids);

       LambdaUpdateWrapper<Dish> queryWrapper = new LambdaUpdateWrapper<>();
       String[] arr = ids.split(",");
       queryWrapper.set(Dish::getStatus,status);
       queryWrapper.in(Dish::getId,arr);

       dishService.update(queryWrapper);

       return R.success("修改成功！");
    }

}
